//
// Copyright 2019 Pixar
//
// Licensed under the Apache License, Version 2.0 (the "Apache License")
// with the following modification; you may not use this file except in
// compliance with the Apache License and the following modification to it:
// Section 6. Trademarks. is deleted and replaced with:
//
// 6. Trademarks. This License does not grant permission to use the trade
//    names, trademarks, service marks, or product names of the Licensor
//    and its affiliates, except as required to comply with Section 4(c) of
//    the License and to reproduce the content of the NOTICE file.
//
// You may obtain a copy of the Apache License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the Apache License with the above modification is
// distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the Apache License for the specific
// language governing permissions and limitations under the Apache License.
//
#include "pxr/imaging/hdx/aovResolveTask.h"
#include "pxr/imaging/hdx/tokens.h"
#include "pxr/imaging/hd/renderBuffer.h"

PXR_NAMESPACE_OPEN_SCOPE

HdxAovResolveTask::HdxAovResolveTask(
    HdSceneDelegate* delegate,
    SdfPath const& id)
 : HdTask(id)
 , _aovBufferPath()
 , _aovBuffer(nullptr)
{
}

HdxAovResolveTask::~HdxAovResolveTask()
{
}

void
HdxAovResolveTask::Sync(
    HdSceneDelegate* delegate,
    HdTaskContext* ctx,
    HdDirtyBits* dirtyBits)
{
    HD_TRACE_FUNCTION();
    HF_MALLOC_TAG_FUNCTION();

    if ((*dirtyBits) & HdChangeTracker::DirtyParams) {
        HdxAovResolveTaskParams params;

        if (_GetTaskParams(delegate, &params)) {
            _aovBufferPath = params.aovBufferPath;
        }
    }

    *dirtyBits = HdChangeTracker::Clean;
}

void
HdxAovResolveTask::Prepare(
    HdTaskContext* ctx,
    HdRenderIndex* renderIndex)
{
    if (!_aovBufferPath.IsEmpty()) {
        _aovBuffer = static_cast<HdRenderBuffer*>(renderIndex->GetBprim(
                HdPrimTypeTokens->renderBuffer, _aovBufferPath));
    } else {
        _aovBuffer = nullptr;
    }
}

void
HdxAovResolveTask::Execute(HdTaskContext* ctx)
{
    HD_TRACE_FUNCTION();
    HF_MALLOC_TAG_FUNCTION();

    if (_aovBuffer && _aovBuffer->IsMultiSampled()) {
        _aovBuffer->Resolve();
    }
}


// -------------------------------------------------------------------------- //
// VtValue Requirements
// -------------------------------------------------------------------------- //

std::ostream& operator<<(
    std::ostream& out, 
    const HdxAovResolveTaskParams& pv)
{
    out << "AovResolveTask Params: (...) "
        << pv.aovBufferPath
    ;
    return out;
}

bool operator==(const HdxAovResolveTaskParams& lhs,
                const HdxAovResolveTaskParams& rhs)
{
    return lhs.aovBufferPath == rhs.aovBufferPath;
}

bool operator!=(const HdxAovResolveTaskParams& lhs,
                const HdxAovResolveTaskParams& rhs)
{
    return !(lhs == rhs);
}

PXR_NAMESPACE_CLOSE_SCOPE
